Moisture Expansion
Moisture Expansion - Related Videos
06:16
Determination of Moisture Content in Soil
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Bradley Schmitz Soils normally contain a finite amount of water, which can be expressed as the “soil moisture content.” This moisture exists within the pore spaces in between soil aggregates (inter-aggregate pore space) and within soil aggregates (intra-aggregate pore space) (Figure 1). Normally this pore space is occupied by air and/or water. If all the pores are occupied by air, the...
08:52
Method to Produce Durable Pellets at Lower Energy Consumption Using High Moisture Corn Stover and a Corn Starch Binder in a Flat Die Pellet Mill
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Cited by 50 •
2016
In this study, a protocol was developed to produce good quality pellets using a flat die pellet mill at reduced specific energy consumption testing high-moisture corn stover and a starch based binder. The results indicated that adding a corn starch binder improved the pellet durability, reduced percent fines and decreased specific energy consumption.
01:10
Moisture Content and Bulking of Aggregate
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2024
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption. When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
09:42
Analysis of Thermal Expansion via Dilatometry
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2023
Source: J. Jacob Chavez, Ryan T. Davis, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Thermal expansion is extremely important when considering which materials will be used in systems that experience fluctuations in temperature. A high or low thermal expansion in a material may or may not be desirable, depending on the application. For instance, in a common liquid thermometer, a material with a high thermal expansion would be...
08:20
In Situ Soil Moisture Sensors in Undisturbed Soils
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Cited by 7 •
2022
The determination of soil water content is a critical mission requirement for many state and federal agencies. This protocol synthesizes multi-agency efforts to measure soil water content using buried in situ sensors.
FAQs
Water uptake changes the balance of intermolecular forces within pores, fibers, or polymer networks. As those internal regions take in moisture, the material can swell, creating dimensional changes that may accumulate through a component. This mechanism matters because even modest local changes can affect fit and generate stress in constrained engineering parts.
Humidity, temperature, material composition, and direction within the structure all influence the response. Different combinations of these factors can change how much moisture enters the material and how dimensional changes develop. Engineers therefore evaluate materials under controlled conditions rather than assuming that one expansion value applies across every environment or component orientation.
The response may differ by direction because moisture interacts with the material's internal structure, including its pores, fibers, or polymer network. This directional behavior is important for engineered parts whose dimensions or constraints are not uniform. Accounting for it helps engineers anticipate uneven swelling, warping, or stress instead of treating the material as dimensionally identical in every direction.
A basic characterization workflow uses controlled conditioning followed by dimensional measurements. Engineers expose a material to specified moisture-related conditions, then measure changes in relevant dimensions and compare the results across conditions, material compositions, or directions. These observations provide evidence for predicting fit, stress, warping, and cracking during later design or durability assessment.
Measurements show how strongly a material's dimensions respond under the tested moisture conditions. When results are considered alongside humidity, temperature, composition, and direction, they help identify conditions associated with greater or lesser dimensional change. Engineers can use that information to assess whether a design may experience fit problems, internal stress, warping, or cracking.
It is relevant when selecting and evaluating wood, polymers, composites, ceramics, and other hygroscopic materials. In these applications, dimensional changes can influence product performance and durability, particularly when components must maintain fit or resist deformation. Engineering assessments use the material response to support more reliable designs and improve expected service life.
Results from controlled conditioning and dimensional measurements give engineers a basis for comparing candidate materials or treatments. The comparisons can show how composition and environmental conditions affect dimensional stability, helping guide choices for a particular design. This approach connects laboratory observations with practical goals such as reducing warping, limiting cracking, and improving structural reliability.